Booster seat



FIG. 1 is a front view of the booster seat;

FIG. 2 is a rear view of the booster seat;

FIG. 3 is a side view of the booster seat;

FIG. 4 is a top view of the booster seat;

FIG. 5 is a bottom view of the booster seat; and,

FIG. 6 is a perspective view of the booster seat. 

CLAIM The ornamental design for a booster seat, as shown and described. 